# Holley Terminator X — Bluetooth App for Terminator X > Mobile companion for Holley Terminator X EFI systems for vehicle performance tuning. (iPhone/iPad app by Holley Performance Products.) - Source: https://appshunter.io/ios/app/holley-terminator-x/id6736920316 (this page in markdown: same URL + `.md`) - Developer: [Holley Performance Products](https://appshunter.io/developer/1175069390) - Category: Utilities - Price: Free - Rating: 4.40/5 from 5 App Store ratings · 3 written reviews indexed - Age rating: 4+ - Requires: iOS 13.0 · 202 MB - Languages: American English - Released: 2025-06-25 - Data updated: 2026-08-16 - Monetization: free - User reviews in markdown: https://appshunter.io/ios/app/holley-terminator-x/id6736920316/reviews.md ## What is Holley Terminator X? UNLOCK THE NEXT LEVEL OF TUNING CONTROL FOR YOUR VEHICLE with the Holley Terminator X EFI mobile app — the ultimate companion for performance tuning right from your iPhone or iPad. Take control of your engine’s performance with 250+ CUSTOMIZABLE PARAMETERS FOR PRECISE TUNING. Designed for enthusiasts and professionals alike, the Holley Terminator X EFI app lets you FINE TUNE ENGINE PARAMETERS FOR MAXIMUM PERFORMANCE — all from the convenience of your mobile device. Key Features: · Six pre-defined real-time monitoring screens for instant access to vital engine data · Intuitive setup wizard helps you easily create a powerful base tune in minutes · View real-time gauges on screen at a glance – no laptop required · Effortlessly create, manage, and share your tuning files with others · Record and share datalogs to review your performance anytime, anywhere · Simple, step-by-step Throttle Position Sensor (TPS) setup for accurate control Built specifically for use with Holley’s Terminator X EFI systems, this app gives you advanced tuning capabilities in a streamlined, mobile-friendly interface. Perfect for racers, tuners, and performance enthusiasts — take your tuning to the next level and keep your engine dialed in with Holley. App Requires the Holley Bluetooth Module to connect to the Terminator X ECU. ## Key features - 250+ customizable engine parameters - Real-time engine data monitoring - Intuitive setup wizard for base tunes - Create, manage, and share tuning files - Record and share datalogs - Step-by-step TPS setup ## Recent user reviews (3 of 3) All indexed reviews: https://appshunter.io/ios/app/holley-terminator-x/id6736920316/reviews.md ### 4/5 — Needs CarPlay *2026-02-19* Great app. If it had CarPlay it would be perfect. ### 4/5 — Great app but should support car play *2025-07-18* The feature set available is great and vey useful. But if this could be a CarPlay app it would get 5stars ### 4/5 — Good but limited *2025-06-30* So, first, when you install the module and turn on your car, it makes you dump the existing tune—so, if you’ve spent a bunch of time on the PC tweaking the settings, I/Os, or anything, that all goes away. With my install (Factory Five Cobra w/ G2 Coyote) I have a check engine light wired for output 2, and my fan set at output 4–they were working with my old map. Unfortunately, it’s only letting me set the fan output but not letting me set the CEL output. So, I’m sure I’ll be spending some quality time with tech support. I also have the Terminator driving my tach, which isn’t working now. So, I’ll need to figure that out too. I’m sure there’s ways to make all this work, and with a brand new app, you expect some room for improvement. I would love to see the app modified to download the existing map to continue working from. For everyone with an existing functioning tune, it’s crazy to force the deletion of it just to use this module. Aside from this gripe, it’s a really cool setup and using an iPad to tune/program is so much more convenient than using the tiny wired touchscreen that you have to use the stylus with. Once we see some app updates, I expect it will get better. ## Frequently asked questions about Holley Terminator X ### What is Holley Terminator X? Holley Terminator X is a mobile application designed to provide advanced tuning control for vehicles equipped with Holley's Terminator X EFI systems. It allows users to fine-tune over 250 engine parameters directly from their iPhone or iPad. ### What are the key features of Holley Terminator X? Key features include real-time engine data monitoring on six pre-defined screens, an intuitive setup wizard for creating base tunes, the ability to create, manage, and share tuning files, and datalog recording for performance review. ### What devices is Holley Terminator X compatible with? Holley Terminator X is compatible with iPhone, iPad, and iPod devices. It requires the Holley Bluetooth Module to connect to the Terminator X ECU. ### How often is Holley Terminator X updated? The latest version of Holley Terminator X is 1.0.4, which was last updated on November 12, 2025. Updates are released periodically to improve functionality and add new features. ### What is the age rating for Holley Terminator X? Holley Terminator X has an age rating of 4+, making it suitable for a wide range of users. The app focuses on technical vehicle tuning functionalities. ### Does Holley Terminator X require a subscription? No, Holley Terminator X is available for free. There are no subscription fees or in-app purchases required to use its core tuning and monitoring features. ### How does Holley Terminator X compare to laptop tuning software? Holley Terminator X offers the convenience of mobile tuning, eliminating the need for a laptop. It provides essential real-time gauges and tuning capabilities in a streamlined interface for on-the-go adjustments. ### What user sentiment is associated with Holley Terminator X? Based on available data, Holley Terminator X has a high rating of 4.5 stars from 4 ratings, indicating positive user sentiment regarding its performance and utility for vehicle tuning. ## Version history (last 5 releases) ### 1.0.10 — 2026-04-16 New Dash Layouts Fixed bug with iPad File sharing Various other minor bug fixes ### 1.0.4 — 2025-11-12 Improvements and bug fixes ### 1.0.2 — 2025-10-16 Dash Screen can now be rotated Bug Fixes ### 1.0.1 — 2025-08-04 Bug fixes ### 1.0.0 — 2025-06-25 No release notes. ## Apps similar to Holley Terminator X | App | Rating | Price | Category | | --- | --- | --- | --- | | [Toolbox TREMEC U.S.](https://appshunter.io/ios/app/toolbox-tremec-us/id6466313595) | 3.3 (3) | Free | Utilities | | [GoDeadOn](https://appshunter.io/ios/app/godeadon/id6446056005) | 4.9 (607) | Free | Utilities | | [Tune Delivery Network (TDN)](https://appshunter.io/ios/app/tune-delivery-network-tdn/id1590560864) | 2.5 (25) | Free | Utilities | | [Dakota Digital](https://appshunter.io/ios/app/dakota-digital/id1444935257) | 3.1 (49) | Free | Utilities | | [E-Tuner 4](https://appshunter.io/ios/app/e-tuner-4/id1579096205) | 4.0 (22) | Free | Utilities | | [Aces Connect](https://appshunter.io/ios/app/aces-connect/id6749562285) | 5.0 (4) | Free | Utilities | ## More apps by Holley Performance Products - [Racepak Dash App](https://appshunter.io/ios/app/racepak-dash-app/id1147871057) - [Racepak D3 Racing](https://appshunter.io/ios/app/racepak-d3-racing/id1271524272) - [Amp’d 2.0](https://appshunter.io/ios/app/ampd-20/id1509089120) - [Classic SCFC+](https://appshunter.io/ios/app/classic-scfc-plus/id1552284876) - [MSD Ultra 6AL](https://appshunter.io/ios/app/msd-ultra-6al/id1604967508) - [APR THROTTLE BOOSTER](https://appshunter.io/ios/app/apr-throttle-booster/id1611772030) All apps by Holley Performance Products: https://appshunter.io/developer/1175069390 ## Related topics [bg performance app](https://appshunter.io/ios/topics/bg-performance-app) · [diablo predator x](https://appshunter.io/ios/topics/diablo-predator-x) · [afterburn performance app](https://appshunter.io/ios/topics/afterburn-performance-app) --- *Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-08-16.*